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M = moles solute L vol solution M= 0.75 moles = 3 M 0.25 liters

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Presentation on theme: "M = moles solute L vol solution M= 0.75 moles = 3 M 0.25 liters"— Presentation transcript:

1 M = moles solute L vol solution M= 0.75 moles = 3 M 0.25 liters
241 # 4. Vol = 0.25 L of solution Moles = 0.75 Molarity (M) = x NOTE: VOLUME IS IN Liters, solute is in moles…no conversions needed M = moles solute L vol solution M= moles = 3 M 0.25 liters

2 M = moles solute L vol solution M= 1.8 moles = 3 M 0.6 liters
241 # 5. Vol = 600 mL L of solution Moles = 1.8 mol Molarity (M) = x NOTE: VOLUME IS IN NOT in Liters, must convert. Volume is given in milliliters, you MUST convert to liters to substitute into molarity equation., 600mL 1L = 0.6 L 1000mL M = moles solute L vol solution M= moles = 3 M 0.6 liters

3 M = moles solute L vol solution M= 1 moles = 2 M 0.5 liters
241 # 6. Vol = 500 mL L of solution Moles = 1.0 mol Molarity (M) = x NOTE: VOLUME IS IN NOT in Liters, must convert. Volume is given in milliliters, you MUST convert to liters to substitute into molarity equation., 500mL 1L = 0.5 L 1000mL M = moles solute L vol solution M= moles = 2 M 0.5 liters

4 M = moles solute L vol solution moles = MASS GFM N 2 x 14 28 H 8 x 1 C
241 # 12. Vol = L of solution Mass = 48 grams (NH4)2CO3 Molarity (M) = x SKILL: calculating Molarity from grams and milliliters. NOTE: VOLUME IS IN NOT in Liters, must convert to Liters. Solute is in grams, must convert to moles. Volume is given in milliliters, you MUST convert to liters to substitute into molarity equation., 2000mL 1L = 2 L 1000mL M = moles solute L vol solution moles = MASS GFM Convert grams of (NH4)2CO3 to moles. 96 g/mol N 2 x 14 28 H 8 x 1 C 1 x 12 12 O 3 x 16 48 M = = 2 L moles = 48 grams 96 g/mol moles = 0.5

5 M = moles solute L vol solution moles = MASS GFM H 2 x 1 S 1 x 32 32 O
242 # 9. Vol =500 mL Mass =x Molarity (M) = 0.2 Reworded: A student needs to prepare 500.mL pf 0.2 molar sulfuric acid, how many grams of sulfuric acid is needed SKILL: calculating Molarity from grams and milliliters. Volume is given in milliliters, you MUST convert to liters to substitute into molarity equation., 500mL 1L = 0.5 L 1000mL M = moles solute L vol solution moles = MASS GFM Convert grams of H2SO4 to moles. 96 g/mol H 2 x 1 S 1 x 32 32 O 4 x 16 64 0.2 = X mol= 0.1mol 0.5 L 0.1mol = X grams 98 g/mol moles = 9.8 grams

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